BACnet.Tagging.TagReaderStream.OptionHasValue C# (CSharp) Метод

        public bool OptionHasValue()
        {
            _require(StreamOp.Option);

            // get the expected tag for an option of this type
            var option = (OptionSchema)_state.Schema;
            var expected = Utils.GetExpectedTag(_state.Tag, option.ElementType);
            bool hasValue = _reader.AtTag(expected.ContextTag, expected.ApplicationTag);
            if(hasValue)
            {
                _stack.Push(_state);
                _state = new SchemaState(option.ElementType, _state.Tag, -1);
            }
            else
            {
                _moveNext();
            }

            return hasValue;
        }